This time using a NEO-GEO as base, since I can then swap cartridges or use a multigame cartridge.
https://www.youtube.com/watch?v=u0jnS-UUoAI
Real hardware, is ALWAYS better then Emulation
Obviously one of the first cartridges to try, at least for me, had to be Magical Drop II
Still have to find and fix, the origin of those graphic glitches, but shouldn't be hard.
NOTE: The seller reported it has 100% working, but unfortunately it doesn't seem to be the case.
Although I already have a Multigame Cartridge with 161 Games (including Magical DropII and Metal Slug Series), I would still like to buy a few individual Cartridges like some of the Metal Slug titles.